i cant play final fantasy vii

i can play final fantasy vii it doesn't even start has it got to do with a 7Z file or smth?

First off please dont use shorthand in the forums words like 'smth' are not acceptable.Secondly provide more information about your issue, for example the system or emulator you are trying to play it on, your current settings and what you have tried already. People cant help without this information.Thirdly read the stickies, common issues and tutorial threads first as these usually contain the answer to your problem.Fourth and finally to solve your issue, try downloading winrar and reading the rar tutorial to extract your rom from the 7z file.
Tutorial here: https://www.romulation.org/forum/index.php/topic,3880.0.html